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Has the incidence of total joint arthroplasty in rheumatoid arthritis decreased in the era of biologics use? A population-based cohort study Zhou, Vivienne Y.; Lacaille, Diane; Lu, Na; Kopeć, Jacek A.; Garbuz, Don; Qian, Yi; Aviña-Zubieta, J. Antonio; Esdaile, John; Xie, Hui

Abstract

Objectives. To determine whether the introduction of biological disease-modifying anti-rheumatic drugs (bDMARDs) was associated with reduced incidences of total hip and knee arthroplasty (THA/TKA) among patients with rheumatoid arthritis (RA) compared with osteoarthritis (OA). Methods. Using a population-based cohort in British Columbia, Canada, RA and OA patients diagnosed between 1995–2007 were divided into semi-annual cohorts according to diagnosis date. For each cohort, we calculated 8-year incidence rates of THA and TKA. We compared levels and trends of THA/TKA incidence in RA/OA patients diagnosed during pre-bDMARDs (1995–2001) and post-bDMARDs (2003–2007) periods using interrupted time-series analysis, adjusting for baseline characteristics. Adjusted 8-year TJA incidence estimated for RA/OA cohorts diagnosed five years after bDMARDs introduction were compared with expected rates assuming no bDMARDs introduction, based on extrapolation of pre-bDMARDs trends. Results. We identified 60,227 RA and 288,260 OA incident cases. For cohorts diagnosed pre-bDMARDs, 8-year THA/TKA incidence rates increased over time in both RA and OA. For cohorts diagnosed post-bDMARDs, these rates decreased over time in RA but continued to increase for OA. For RA, differences between the post- and pre-bDMARDs secular trends in incidence rates were -0.49 (p=0.002) for THA and -0.36 (p=0.003) for TKA, compared to +0.40 (p=0.006) and +0.54 (p<0.001), respectively, for OA. For RA cohorts diagnosed five years after bDMARDs introduction, 8-year incidence were 26.9% and 12.6% lower for THA and TKA, respectively, than expected rates. In contrast, corresponding rates in OA were higher by 11.7% and 16.6%, respectively. Conclusion. Arthritis onset after bDMARDs introduction is associated with a significant reduction in THA/TKA incidence in RA, but not in OA. The reduction reflects a significant improvement in RA treatment during the biological era.

Item Metadata

Title
Has the incidence of total joint arthroplasty in rheumatoid arthritis decreased in the era of biologics use? A population-based cohort study
Creator
Zhou, Vivienne Y.; Lacaille, Diane; Lu, Na; Kopeć, Jacek A.; Garbuz, Don; Qian, Yi; Aviña-Zubieta, J. Antonio; Esdaile, John; Xie, Hui
Contributor
Arthritis Research Canada
Publisher
Oxford Academic
Date Issued
2021-08-09
Description
Objectives. To determine whether the introduction of biological disease-modifying anti-rheumatic drugs (bDMARDs) was associated with reduced incidences of total hip and knee arthroplasty (THA/TKA) among patients with rheumatoid arthritis (RA) compared with osteoarthritis (OA). Methods. Using a population-based cohort in British Columbia, Canada, RA and OA patients diagnosed between 1995–2007 were divided into semi-annual cohorts according to diagnosis date. For each cohort, we calculated 8-year incidence rates of THA and TKA. We compared levels and trends of THA/TKA incidence in RA/OA patients diagnosed during pre-bDMARDs (1995–2001) and post-bDMARDs (2003–2007) periods using interrupted time-series analysis, adjusting for baseline characteristics. Adjusted 8-year TJA incidence estimated for RA/OA cohorts diagnosed five years after bDMARDs introduction were compared with expected rates assuming no bDMARDs introduction, based on extrapolation of pre-bDMARDs trends. Results. We identified 60,227 RA and 288,260 OA incident cases. For cohorts diagnosed pre-bDMARDs, 8-year THA/TKA incidence rates increased over time in both RA and OA. For cohorts diagnosed post-bDMARDs, these rates decreased over time in RA but continued to increase for OA. For RA, differences between the post- and pre-bDMARDs secular trends in incidence rates were -0.49 (p=0.002) for THA and -0.36 (p=0.003) for TKA, compared to +0.40 (p=0.006) and +0.54 (p<0.001), respectively, for OA. For RA cohorts diagnosed five years after bDMARDs introduction, 8-year incidence were 26.9% and 12.6% lower for THA and TKA, respectively, than expected rates. In contrast, corresponding rates in OA were higher by 11.7% and 16.6%, respectively. Conclusion. Arthritis onset after bDMARDs introduction is associated with a significant reduction in THA/TKA incidence in RA, but not in OA. The reduction reflects a significant improvement in RA treatment during the biological era.
Subject
Rheumatoid arthritis; primary total joint arthroplasty; interrupted time-series; administrative health data
Genre
Article; Postprint
Type
Text
Language
eng
Date Available
2022-08-09
Provider
Vancouver : University of British Columbia Library
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International
DOI
10.14288/1.0413702
URI
http://hdl.handle.net/2429/81635
Affiliation
Business, Sauder School of; Medicine, Faculty of; Non UBC; Medicine, Department of; Orthopaedic Surgery, Department of
Citation
Zhou VY, Lacaille 3 D, Lu N, Kopec J, Garbuz D, Qian Y, Aviña-Zubieta JA, Esdaile J, Xie H. Has the 4 incidence of total joint arthroplasty in rheumatoid arthritis decreased in the era of 5 biologics use? A population-based cohort study. Rheumatology (Oxford). 2021 Aug 6 9;keab643
Publisher DOI
10.1093/rheumatology/keab643
Peer Review Status
Reviewed
Scholarly Level
Faculty; Researcher; Graduate
Copyright Holder
The Authors
Rights URI
http://creativecommons.org/licenses/by-nc-nd/4.0/
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Attribution-NonCommercial-NoDerivatives 4.0 International